The argument remains extremely heated there are necessary conditions of existence such as water on the Mars.
| A．that | B．whether | C．if | D．which |
It isn’t clear_____ is to blame.We need to find a solution to the problem first.
| A．who is it that | B．who it is that | C．it is who that | D．that who it is |
I saw a woman running toward me in the dark.Before I could recognize who she was,she had run back in the direction____she had come.
| A．of which | B．by which | C．in which | D．from which |
——How about____Christmas evening party?
——I should say it was ____ success.
| A．a;a | B．the;a | C．a;/ | D．the;/ |
—What do you mean ________ saying “The boy is overgrowing”?
— I mean that he is tall ________ his age.
| A．by; for | B．as to; for | C．about; with | D．by; to |
— What a shame ! It turned out to be a failure.
— We missed a process,_______ we could not succeed in the experiment.
| A．and otherwise | B．and therefore | C．or perhaps | D．but luckily |