We can’t other countries in trade if we don’t develop our national economy.A. compete for

问题补充：

We can’t other countries in trade if we don’t develop our national economy.

A. compete for

B. compete against

C. catch up

D. catch with

答案：

A. compete for

(答案→)B. compete against

C. catch up

D. catch with

解析：考查词组：compete for sth．的意思是“为了…竞争”。Compete against和…竞争，catch up赶上，catch with接住，抓住，本句话的意思是：“如果我们不发展我们的民族经济的话，在商业方面我们就不能够和其他国家竞争。”选B。