What do you think of Mike?-A nice boy! __________ a monitor, he not only studies hard but also likes helping his classmates.[ ]

Timmy often gets full marks in the exams, but he never shows off. He is very ______.

There is ______milk in the bottle. Let’s go to buy some.

I didn’t hear you because Ithe news on the radio.

Do you mind if I ＿＿＿＿＿＿with my work while you are getting tea ready? — No, not at all.