单选题A large supply of spare parts is very expensive, so a companyA will try to keep as many as it can.B will try to keep as low as it can.C will try to make them all by itself.D will try to deliver it quickly.

A. while

B. which

C. when

D. so

Encourage your children to try new things, but try not to _________ them too hard.

A．draw

B．strike

C．rush

D．push

—It’s very important ___________ us to make a plan before a new term.

—Yes. You must try to make it carefully.

A. of B. for C. to

Try to spend your time just on the things you find _________. 

 A. worth doing them B. worth being done C. them worth doing D. worth doing

You can try these methods to keep your interview anxiety()control.

A. under

B. on

C. with

Encourage your children to try new things, but try not to ___ them too hard.

A. draw B. strike

C. rushD. push

A、meet

B、get

C、make

(A)try on

(B) try in

(C) try out

(D) try for

“I usually go to work by bus.”“Why notby bike for a change?”()

A. trying to go

B. try going

C. to try going

D. try go

设有结构体类型定义： struct try { int one; float two; }*str;若要动态开辟一个结构单元，使指针str指向其首地址，正确的语句是______。

A．str=(try*)malloc(sizeof(try));

B．*str=(struct try*)malloc(sizeof(struct try));

C．str=(strucy try*)malloc(sizeof(struct try));

D．str=(struc try)malloc(sizeof(struct try));