If he had been (A) looking (B) where he was going (C), he wouldn’t walk (D) into the wall.
A.wouldn’t walk (D)
B.had been (A)
C.looking (B)
D.was going (C)

Should Jade gets (A) to interview (B) a famous politician, she will (C) ask lots of (D) difficult questions.
A.gets (A)
B.will (C)
C.lots of (D)
D.to interview (B)

If energy will be (A) inexpensive and unlimited (B), many things (C) in the world would be (D) different.
A.would be (D)
B.will be (A)
C.many things (C)
D.unlimited (B)

I didn’t bring (A) him with me if (B) I had known (C) you and he didn’t get (D) along with each other.
A.didn’t bring (A)
B.didn’t get (D)
C.if (B)
D.had known (C)

If you can give (A) me one good reason (B) for your acting like this, I don’t mention (C) this incident (D) again.
A.can give (A)
B.incident (D)
C.don’t mention (C)
D.good reason (B)

I didn't know (A) you were asleep; otherwise (B), I didn’t make (C) so much noise when I came (D) in.
A.came (D)
B.otherwise (B)
C.didn’t make (C)
D.didn't know (A)

Should I (A) interested (B) in that subject, I would try (C) to learn (D) more about it.
A.interested (B)
B.to learn (D)
C.would try (C)
D.Should I (A)

You must read (A) the instructions; otherwise, (B) you hadn’t known (C) how to use (D) it.
A.hadn’t known (C)
B.must read (A)
C.otherwise, (B)
D.how to use (D)

If he hadn’t helped me, I wouldn’t have been so successful.
A.Without his help, I wouldn’t be so successful.
B.Unless he had helped me, I wouldn’t have been so successful.
C.Without his help, I wouldn’t have been so successful.
D.But for he hadn’t helped me, I wouldn’t have been so successful.

Without your assistance, I couldn’t have finished the game.
A.Unless your assistance, I couldn’t finish the game.
B.Had it been for your assistance, I couldn’t have finished the game.
C.But for your assistance, I couldn’t finish the game.
D.If it hadn’t been for your assistance, I couldn’t have finished the game.