---Where did you ________ our chemistry teacher?
--- It was in the supermarket ________ I bought the moon cakes.
| A．happen to meet; that | B．come across; where |
| C．meet with; what | D．run into; which |
Being a good listener is a kind of quality and that’s ___ it takes to keep friendship.
| A．how | B．what | C．which | D．where |
As is recorded in history, silkworms（蚕）were first raised by a woman in _________ is today Hebei Province．
| A．where | B．the place | C．which | D．what |
Does it make any difference __________ he refuses or accepts the invitation?
| A．whether | B．which | C．if | D．that |
You have not yet answered my question _______ I can join in the party tonight．
| A．whether | B．if | C．which | D．that |
Regulations require__________needs special diets the cooking manager in advance.
| A．who; informs | B．whom; informed | C．whomever; inform | D．whoever; inform |