Some people ___feel sick when they read a book in a car or on a boat.
| A．must | B．should | C．may | D．need |
You ______ wear sports shoes when you climb a mountain.
| A．can’t | B．shouldn’t | C．mustn’t | D．have to |
Thomas wants to know ______Nina lives.
| A．where | B．who | C．what | D．if |
He didn’t go there yesterday, _______he?
| A．did | B．does | C．didn’t | D．doesn’t |
He ______when the UFO arrived. He didn’t wake until the UFO disappeared.
| A．slept | B．was sleeping | C．was doing homework | D．was singing |
He said that light ______much faster than sound.
| A．has travelled | B．went | C．travels | D．travelled |