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
I won’t pass the exam ______I work hard..
A. whenever B. because C. if D. unless
