_____ will greatly decide their future, most senior 3 students think, is their grades．
| A．That | B．Which | C．What | D．As |
The student did what they ___ the old man.
| A．could help | B．could helping | C．could to help | D．might help |
The young man suddenly returned __ a rainy night.
| A．at | B．in | C．during | D．on |
He had rushed out of the door __ I could offer my thanks.
| A．unless | B．before | C．until | D．even though |
The wounded soldier lost ___ of blood.
| A．a great many | B．a large quantity | C．a great number | D．quite a few |
A pair of slippers ___ under the bed.
| A．has | B．are | C．is | D．have |