—May I watch TV for another 15 minutes, Mum?
—Oh, dear, if you _____.
| A．can | B．must | C．may | D．should |
.Lots of rescue workers were working around the clock ,supplies to Yushu, Oinghai province after the earthquake.
| A．sending | B．to send | C．having sent | D．to have sent |
. Listen! Do you hear someone __________for help?
| A．calling | B．call | C．to call | D．called |
Dina, _______ for months to find a job as a waitress, finally took a position at a local advertising agency.
| A．struggling | B．struggled | C．having struggled | D．to struggle |
. So far nobody has claimed the money ___________________in the library.
| A．discovered | B．to be discovered | C．discovering | D．having discovered |
.(江苏卷28). The retired man donated most of his savings to the school damaged by the earthquake in Yushu,
________ the students to return to their classrooms.
| A．enabling | B．having enabled | C．to enable | D．to have enabled |