Непонятные ошибки в работе по английскому

[rick]

Вернули работу и сказали что нужно переделать некоторые предложения. Там где я совершил ошибики стоят скобки с начальными формами глаголов. Помогите пожалуйста

задание 1. use the correct tense-form of the verbs in brackets

2. wake up! You(sleep)long enough. It is time to get up
3. I wrote to Diana last week but she (not/answer) my letter yet. I have been still waiting for a reply.
6. Since my classes (begin) I (not/have) much free time. I (have) several big tests to study for lately.

задание 2. Use the right article

1.When was ... last time you had a holiday ?
2.These days most people choose a package tour especially if they go abroad on ... holiday.

задание 3. Fill in the suitable preposition or adverb

1.The population of Oxford is about 115,000, ... whom approximately 14,400 are university students.
2.The basis of tuition is the tutorial, ... which students meet with their tutor once or twice a week for every tutorial a student will prepare a written essay in which this or that problem must be argued.

задание 4. Translate the Russian fragment into english
3. Where's the money I have (дал взаймы) you?
5. He tore up my photo, (что) upset me greatly.

[English Guru]

2. wake up! You(sleep)long enough. It is time to get up

You've been sleeping long enough

3. I wrote to Diana last week but she (not/answer) my letter yet. I have been still waiting for a reply.

she hasn't answered - в данном случае уместно нарушить правило согласования времен

6. Since my classes (begin) I (not/have) much free time. I (have) several big tests to study for lately.

began; I haven't had much; I have had...

1.When was ... last time you had a holiday ?

the

2.These days most people choose a package tour especially if they go abroad on ... holiday.

без артикля (zero article)

1.The population of Oxford is about 115,000, ... whom approximately 14,400 are university students.

amoung

2.The basis of tuition is the tutorial, ... which students meet with their tutor once or twice a week for every tutorial a student will prepare a written essay in which this or that problem must be argued.

at

3. Where's the money I have (дал взаймы) you?

lent

5. He tore up my photo, (что) upset me greatly.

which вроде, но я тут не уверен, возможно и that, но перед ним редко запятая.