There happened to be nobody under the wall when it fell down, ____ ?
| A．wasn't there | B．was there | C．didn't there | D．did there |
---what causes your heart attack？
---It is_____
| A．because of your overweight |
| B．your being overweight |
| C．because you are overweight |
| D．you are so overweight |
--- I can’t find Mr. Smith .Where did you meet him this morning?
--- It was in the hotel ___ he stayed.
A. thatB whichC. the oneD. where
. I failed in the final examination last term and only then____ the importance of studies.
A I realized B I had realized C had I realizedD did I realize
. On the opposite wall____ one map____ dozens of pictures.
A hang, including B are hung, together with C is hanged, with D is hanging, as well as
. So absorbed _____ in her work that she didn’t realize I was behind her.
A had sheB was sheC she had D she was