---Answer the doorbell, please. It must be your uncle.
---It Heidi. She’s coming over this morning to help me with my math.
| A．is | B．can’t be | C．could be | D．will be |
He finally bought several books by Tom, _____ is one.
| A．which of them | B．which of whose | C．of which this | D．any of them |
---- Is that the small town you often talk about?
----- Yes, just the one______ I used to work for years.
| A．that | B．which | C．where | D．what |
Everyone stood up______ the hero came into the lecture hall.
| A．while | B．instant | C．every time | D．immediately |
Everyone stood up______ the hero came into the lecture hall.
| A．while | B．instant | C．every time | D．immediately |
Does_____matter if an engineer is a man or a woman?
| A．that | B．it | C．this | D．what |