— Mary, let’s go to the lecture by Hawking, which is said to be very interesting.
— I’d like to, but I ________ finish the report first.
A. can B. may 
must D. shall
—All the building materials have been washed away.
—So I have heard. But there was no sign ____ a heavy rain was on the way last night.
| A．when | B．that | C．which | D．If |
—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 |
_______he couldn't understand was_________more and more students showed interest in the computer games.
| A．What； because | B．That, what | C．What； why | D．Why； that |
In some countries, ______ is called “equality” does not really mean equal rights for all people.
| A．that | B．what | C．which | D．how |
The news came, as expected, __________ my cousin was chosen to be a foreign aid doctor to go to Africa where people are suffering a lot from aids.
| A．it | B．that | C．what | D．Which |