John and Mary ___ each other since 1976.
A.have been knowing
B.were knowing
C.have known
D.were known

He ___ reading for two hours when she came in.
A.has been
B.had been
C.was
D.will be

Who was the first person ___ the South Pole?
A.reaching
B.to reach
C.reached
D.who reaches

If I ___ you, I would not have said such nonsense.
A.am
B.have been
C.will be
D.had been

If you have any problem, don't worry, I.... you
A.have helped
B.don’t help
C.will help
D.will have helped

By the time they arrive at the village, all the villagers (leave) for another valley.
A.are leaving
B.will leave
C.have left
D.will have left

She _______ (not/come) until you are ready.
A.won’t come
B.doesn’t come
C.won’t be coming
D.would come

We have got 2 hours. We (do) all the house work by the time your parents arrive.
A.will have been doing
B.will be doing
C.will have done
D.will do

If she passes the exam, she _________________________ (be) very happy.
A.would be
B.should have been
C.will be
D.is being

Look at those clouds. It....now.
A.is raining
B.rains
C.will rain
D.is going to rain