27.Albert Einstein, ____ life had once been very hard , was given the Nobel Prize for physics.
| A．of whom | B．for whom | C．for whose | D．in whom |
—Can I use your laptop for a while?
—; anyhow I am not using it now．
| A．That's OK | B．By all means | C．It doesn't matter | D．Use it |
Only after Helen moved to Australia ______ how important she was to me .
| A．I had realized | B．had I realized | C．I did realize | D．did I realize |
Spelling Bee is a contest competitors, usually children, are asked to spell as many words as possible.
| A．which | B．where | C．what | D．When |
We began to open to the outside world in the ate 1970s. , there have been great changes in the country.
| A．As a result of | B．As a result | C．First of a11 | D．After all |
Sun Yang, a young Chinese swimming talent, several gold medals before the 2012 London Olympics.
| A．won | B．has won | C．had won | D．were to win |