By the time he was twelve he ______ a chemistry lab of his own.
| A．built | B．has built | C．had built | D．was building |
______ snacks and drinks, but they also brought cards for entertainment when they had a picnic in the forest.
| A．Not only they brought | B．Not only did they bring |
| C．Not only brought they | D．Not only they did bring |
Come and see me, whenever ________.
A. you are convenient B. you will be convenient
C. it is convenient to you C. it will be convenient to you
That it keeps raining cats and dogs ________ the tourists.
| A．worry | B．worried | C．worries | D．worrying |
I have the same opinion as yours about ________ the privacy of one’s life should be kept secret.
| A．whether | B．what | C．which | D．when |
________ enthusiastic about drawing.
| A．It seems to be | B．He seems that | C．It seems that | D．He seems to be |