Whatsup?Youlookworried.Well,Io

-What's up? You look worried.
Well,I_____on the problem for 5 hours but I haven't got a single clue.

A．have worked	B．worked
C．will work	D．have been working

登录免费查看答案和解析

相关试题

The more one is ______ the English-speaking environment, the better he or she will learn the language.

A．kept up

B．filled in

C．caught in

D．exposed to

收藏答案/解析

It is requested that the reporter _______ to blame for the wrong report.

A．referring to	B．referring to be
C．referred to be	D．referred to being

收藏答案/解析

It’s such a good place ______ everyone wants to go and visit _______ it is well-known all over the world.

A．that; that

B．as; as

C．as; that

D．that; as

收藏答案/解析

A direct air route _______ Chongqing and San Francisco is expected to open next month．

A．linking

B．being linked

C．link

D．linked

收藏答案/解析

He will have learned English for eight years by the time he _______ from the university next year．

A．will graduate

B．will have graduated

C．graduates

D．is to graduate

收藏答案/解析