Choose the best answer to complete the sentence.John _____________ for the government since he graduated from Harvard University. Until recently, he has still enjoyed his work there, but now he is talking about his retirement plan.

Choose the best answer to complete the sentence.I ________ Mark for hours and hours and he hasn't answered. I'm really angry with him!

Give the correct form of verbs in the brackets using the present perfect continuous.

I(read)______this book since last night

Give the correct form of verbs in the brackets using the present perfect continuous.

She (not arrive)_____ yet. I (wait)_____ her for half an hour._____the film (start)_____?

Give the correct form of verbs in the brackets using the present perfect continuous.

How long_____you (stay) in Da Nang? – I (live)_______ there for 3 months. I (finish)______ an English course.

Give the correct form of verbs in the brackets using the present perfect continuous.

They(not eat)______anything all the morning

Give the correct form of verbs in the brackets using the present perfect continuous.

I( think)________of  buying new bicycle for my son. He(use)______ an old one since he was in secondary school. I (fix)______ it several times.