The boys followed the marks that they ______, until finally they found their way back to the campsite.
| A．left | B．have left |
| C．had left | D．have been left |
Suppose we meet with a situation ________ none of us can deal with, what then?
| A．where | B．when |
| C．what | D．that |
It is announced that big prizes will go to ________ finishes the assignment on time.
| A．whom | B．who |
| C．whomever | D．whoever |
It remains to be seen ________ the newly formed committee's policy can be put into practice.
| A．that | B．which |
| C．what | D．whether |
Helen has just heard the news from her father ________ her boyfriend David will come back soon.
| A．when | B．how |
| C．which | D．that |
_______ you said at the meeting describes a bright future for the company.
| A．When | B．How |
| C．What | D．That |