Last year many well-known singers did everything _______ help the people in the tsunami-hit countries.
| A．she could do | B．she could to | C．that she could do | D．that she could |
He seems too tired today, and I wonderhe got a good sleep last night.
| A．when | B．that | C．if | D．where |
The traveler lost his way in the woods, and made things worse was that it was getting dark.
| A．that | B．what | C．which | D．as |
—I rang you at about nine, but there was no reply.
—Oh, that was probably I was seeing the doctor.
| A．why | B．when | C．what | D．that |
She looks sad. Could you please tell me ____ that prevents her from being as happy as before?
| A．what it is | B．it is what | C．how it is | D．it is how |
I think that this meal was well worth _______ was charged for it.
| A．that | B．what | C．which | D．how many |