I don't know what prevented him ________ the lecture.

[　　]

It kept raining for a few days, ________ was what the farmers wanted.

[　　]

—Why didn't you ask them for help?

—I knew ________ of those people.

[　　]

It's snowing hard outside. You must drive ________ as you can.

[　　]

Computers ________ in the fields of education, health and research.

[　　]

A．take a great part

B．play an important part

C．take great part

D．play important part

It's ________ of money to buy many things that are not needed.

[　　]

All the students ________ to do better in the coming examination.

[　　]

A．made their mind up

B．made up their mind

C．made their minds up

D．made up their minds

They went across the river, ________ a small boat.

[　　]

How sweet the music ________ ! I like it very much.

[　　]

________ from the hill, the city looks more beautiful.

[　　]