31) You _______ care of your health.
(A) had better to take
(B) had better take
(C) had better taken
(D) had taken better
32) Unless protected areas are established, the Bengal tiger, the blue whale, face _________ of extinction.
(A) possible
(B) the possibility
(C) to be possible
(D) possibly
33) If water is heated to 212 degrees F ________ as steam.
(A) it will boil and escape
(B) it is boiling and escaping
(C) it boil and escape
(D) it would boil and escape
34) These days transport ________ faster and easier than ever before.
(A) will become
(B) can become
(C) becomes
(D) is becoming
35) I ________ your work.Please remind me.
(A) had forgotten
(B) forget
(C) forgot
(D) have forgotten
36) I _______ on this topic for some time before I realised my mistake.
(A) am speaking
(B) have been speaking
(C) speak
(D) had been speaking
37) If Napoleon had not invaded Russia, he ________ the rest of Europe.
(A) had conquered
(B) would conquer
(C) would have conquered
(D) conquered
38) No one ________ which college he will join.
(A) would know
(B) know
(C) can know
(D) knows
39) I _______ on this topic for some time before I realised my mistake.
(A) am speaking
(B) have been speaking
(C) have spoken
(D) spoke
40) Can you tell me _________?
(A) where does he live
(B) where he lives
(C) where is he living
(D) where has he lived