________ is important ________ you to grow young plants at the correct time of year .

[　　]

A worker will come to our school and teach us ________ the machine.

[　　]

A．how to run

B．to run

C．running

D．how to running

从所给的四个选项中选择最佳答案

She offered to drive us to Aswan, but we ______．　　　

[　　]

A．would like walking　　　B．preferred to walk

C．like to walk　　　　　　D．prefer to walking

从所给的四个选项中选择最佳答案

Tom had to go and ______ his teacher, as he wasn't able to turn in his composition in time．　　　

[　　]

A．faced to　　　B．face before　　　C．face　　　D．face in front of

从所给的四个选项中选择最佳答案

The Great Wall dates ______ to the Qin Dynasty．　　　

[　　]

A．from　　　B．×　　　C．back　　　D．from back

从所给的四个选项中选择最佳答案

Mr French is a nice man ______．　　　

[　　]

A．working　　　B．working with

C．to work　　　D．to work with

从所给的四个选项中选择最佳答案

He ______ conversation with a friend.

[　　]

A．is engaged to　　　B．is engaged at

C．is engaged in　　　D．is engaged on

Printing ________ by the 13th century.

[　　]

A． had developed further　　　　　B．have been developed

C． had been developed further　　　D． None of the above

[　　]

A． about　　　B． of　　　C． by　　　D． with

[　　]

A． let, not burn　　　　B． prevent, from burning

C． get, away from　　　D． see, above