I won’t lend you this money _____you promise to pay it back.
A.if
B.unless
C.or
D.or else

_______me and I’ll expain the homework to you.
A.Call
B.I you call
C.Calling
D.To call

Are you thinking about going to Nha Trang for the holidays ?”

“No, but if I _____the time, I would definitely go .”
A.have
B.had
C.have had
D.would have

“It’s really raining. ” ” Yes, If the weather ______, we’ll have to camp somewhere else.”
A.would get worse
B.might get worse
C.get worse
D.should get worse

“My boss made me work overtime again. ”

“ If I were you , I______my job.”
A.would quit
B.will quit
C.must quit
D.quit

“Remember the day I drove you to airport ?”

“ If you hadn’t ____me, I would have been late.”
A.take
B.taking
C.took
D.taken

“I don’t know whether to take that mathematics course or not .”

“ If ______you , I’d take it.”
A.I am
B.I will be
C.I had been
D.I were

“My car broke down when I was leaving Detroit and I had to take the bus .”

“______, we would have picked you up”
A.Had we known
B.If we have known
C.We had known
D.If we did known

If I _____as young as you are , I _____in a boat round the world.
A.were----would sail
B.would be----would sail
C.were-----will sail
D.would----would sail

She_____tennis if it _____not so hot.
A.would play----were
B.would play----would be
C.will play -----were
D.would play---is