Scientistssayitmaybefiveorsixy

Scientists say it may be five or six years ______ it is possible to test this medicine on human patients.

A．before

B．after

C． since

D．when

登录免费查看答案和解析

相关试题

______ recent report stated that the number of Spanish speakers in the U.S. would be higher than the number of English speakers by ____ year 2090.

A．A; the	B．A; /
C．The; /	D．The; a

收藏答案/解析

--Did he notice you enter the room?
--I don’t think so. He ________ to the radio with his eyes shut.

A．listened	B．was listening
C．had listened	D．has listened

收藏答案/解析

It is ten years since we ________ each other. We have been working together.

A．know	B．knew
C．get to know	D．got to know

收藏答案/解析

I asked my English teacher and he replied with a ________look.

A．determine	B．determines
C．determining	D．determined

收藏答案/解析

The plane takes off at 6:00 p.m. So I have to arrive at the airport ________ 5:30 p.m. at the latest.
A after B. since C. until D. by

收藏答案/解析

推荐套卷

热门套卷