The number of students in our school ____about 30,000 and ______them study hard.
| A．is; a large amount of | B．are ; a number of |
| C．are ; large amount of | D．is ; a large number of |
----Why did you go back to the shop?
-----I left my friend _____there.
| A．waiting | B．to wait | C．wait | D．waits |
I advise you to give up smoking for it is _____to your health.
| A．harm | B．harmless | C．harmful | D．harmfully |
I don’t doubt _____he will come next week.
| A．that | B．if | C．what | D．when |
When the thief found the police had already _____him, he ran away quickly.
| A．realized | B．known | C．spotted | D．stared |
Tom’s father didn’t _____him to join the school football team.
| A．let | B．promise | C．hope | D．permit |