—It is _______he often fails in exams_______ makes his parents worried about him.
—So, he has to work whole-heartedly.
| A．what, that | B．that, what | C．that, that | D．/, that |
It hasn't been made clear ________ the new underground line is to be open to traffic.
| A．when | B．that |
| C．what | D．where |
What impresses me most is ________ he appears in front of others, he wears a sincere and charming smile.
| A．what | B．which |
| C．that where | D．that whenever |
It is announced that big prizes will go to ________ finishes the assignment on time.
| A．whom | B．who |
| C．whomever | D．whoever |
The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them.
| A．while | B．when |
| C．as | D．before |
Actually, the London Olympic Park is built ________ there used to be a poor area called East London.
| A．what | B．when |
| C．where | D．why |