If we don’t use money ________ ， we’ll have a difficult time.

Shall I tell John about it — No , you . I’ve told him already .

Farmers in China began to use tractors ___cattle for farming work.

Mary told me she would computer studies. —Really? I’ll try my best to ask her to such foolish ideas.

I’d like to_____whether Flight 245 for San Francisco is taking off on time.[ ]