I.Give the correct form of the verbs in the brackets (Chia động từ trong ngoặc cho phù hợp)
15. It (not be) often ________ cold in summer.
16. He (watch) ________ TV right now.
17. At present they (sit) ________ in the class.
18. This year we (learn) ________ English.
19.Look! Peter (play) ________ football in the schoolyard.
20. Be quiet! The baby (sleep) ________.
