Various ways have been provided for us to solve the problem. We can choose _____to start with.
| A．it | B．that | C．each | D．one |
Did you see them ____ basketball this morning?
| A．playing | B．were playing | C．to play | D．are playing |
He didn’t study hard, so he was afraid ______ in the exam.
| A．fail | B．to fail | C．failing | D．failed |
I had some problems _____ my homework.
| A．to finish | B．finishing | C．finishes | D．finish |
Can you learn English ________ chatting on the Internet?
| A．in | B．with | C．by | D．for |
He thinks _____ history about Chinese is very important.
| A．studied | B．studying | C．studies | D．study |