The English play ______ many students acted at the New year’s party was a great success.
A.for which | B.at which | C.on which | D.in which |
It is clear that no use can be made ______radium _____we don’t know clearly the characteristics of it.
A.from; if | B.of; unless | C.from; unless | D.of; if |
From my point of view, the theory that ______ by the scientist is not quite scientific.
A.was risen | B.brought up | C.had been raised | D.was put forward |
The invention of steam engine greatly sped up the industrial revolution, which _____ a lot to the take-off of the world.
A.led | B.contributed | C.constructed | D.exposed |
I came here with your mother ________ to see you.
A.specially | B.special | C.especially | D.especial |
How did all these _________?
A.came out | B.come up | C.come across | D.come about |