----- Why does Sara know so much about Angkor Wat?
----- She _________ have been there, or….
| A．must | B．oughtn’t to | C．may | D．can’t |
Shanghai is the first city in the world ____a high-speed maglev train, from the city to Pudong Airport.
| A．to build | B．to be built |
| C．to have built | D．to have been built |
—Are you content with her lecture?
—Nowhere near that. It ____.
| A．may have been good | B．couldn’t have been worse |
| C．can’t be better | D．must be better |
A British man who ____ to play practical jokes ____ his own humorous art work in four major New York museums over the last two weeks.
| A．liked; has secretly hung | B．likes; has secretly hung |
| C．had liked; secretly hung | D．has liked; secretly hung |
____ nearly all behavior is learned behavior is a basic assumption of social scientists.
| A．/ | B．That | C．It is acceptable | D．When |
I know the man by ____ but I have never spoken to him.
| A．chance | B．heart | C．sight | D．experience |