He must be helping the old man to water the flowers，________？
| A．is he | B．isn't he |
| C．must be | D．mustn't he |
______, we’ll go camping.
| A．weather permits | B．If weather will permit |
| C．weather permitting | D．weather permitted |
It is in the west of China _____ there is no doubt _____it is going to rain tomorrow.
| A．where; whether | B．that; that |
| C．that; whether | D．where; that |
Please tell me how the accident_____. I am still in the dark.
| A．came by | B．came out |
| C．came to | D．came about |
________ with the size of the whole earth, the biggest ocean does not seem big at all.
| A．Compare | B．When comparing |
| C．Comparing | D．When compared |
With my money ______, I went back home.
| A．ran out of | B．ran out | C．running out of | D．running out |