.
We won’t know how much food to buy until we decide how many people ________.
| A．were coming | B．are coming | C．have been coming | D．had come |
She won’t leave the TV set, ____ her husband is waiting for his supper.
| A．as though | B．even though | C．whether | D．whenever |
— ____ makes her different from the other students?
— Honesty, I think.
| A．How is it that | B．How is that | C．What is it that | D．What it is that |
He went home for lunch ____ the clock struck twelve.
| A．while | B．immediately | C．right away | D．at once |
19. Is this the very factory ____ he visited last month?
| A．which | B．that | C．where | D．in which |
The first thing ____ you should do is to learn all the new words by heart.
| A．what | B．that | C．which | D．who |