Chia động từ ( thì hiện tại hoàn thành)
1.He (have)……… not learned today.
2.They (buy)…………..a new book.
3.They (not/ plan)…………..their holiday yet.
4.Where (be/ you)?………..
5.I (write)…………..four letters.
6.he (not/ see)…………..her for a long time.
7.(be/ you)…………..at school?
8.School (not/ start)…………..yet.
9.(speak/ he)…………..to his boss?
10.No, she (have/ not)…………..the time yet.