Uptillnow,fulluseofthistheoryh

Up till now, full use of this theory has been ________ in building large ocean-going ships.

A．done

B．made

C．laid

D．taken

登录免费查看答案和解析

相关试题

-- Has John arrived yet?
-- No, she _______ an hour ago.

A．was supposed to come	B．must have come
C．should come	D．ought to have come

收藏答案/解析

Although most of them have no doubt ________ he will pass the exam , I still wonder _______ he has really got everything ready.

A．whether; that

B．that; whether

C．that; that

D．whether; whether

收藏答案/解析

It wasn’t until nearly a month later ________ I received the manager’s reply.

A．since

B．when

C．as

D．that

收藏答案/解析

Jane didn’t follow our advice that she ___ more attention to her pronunciation.

A．be paid

B．must pay

C．pay

D．would pay

收藏答案/解析

-- I go out to play now, mum?
--No, you . You should do your homework first.

A．Must, mustn’t	B．Might, wouldn’t
C．Need, mustn’t	D．May, had better not

收藏答案/解析