Choose the correct answer to complete the following sentences.
I …......... back from a business trip to France.
A.just came
B.have just come
C.have just came
D.just have come

Choose the correct answer to complete the following sentences.
I can't believe that you .........the news yet.
A.haven't read
B.didn't read
C.don't read
D.not read

Choose the correct answer to complete the following sentences.
There is no more cheese. I ……….... it all.
A.has already eaten
B.have already eaten
C.already eaten
D.have already ate

Choose the correct answer to complete the following sentences.
How long ............... each other?
A.have you known
B.did you known
C.you have known
D.have you knew

Vaccinating is the best ___ of some certain infectious diseases.
A.prevent
B.prevention
C.preventing
D.preventer

___ is all that most human beings are looking for.
A. Happiness
B. Happy
C.Happily
D.Unhappy

The aim of the conference is to promote international ___.
A.friend
B.friendship
C.friendless
D.friendly

Mr. Pike invited some ___ to his house for dinner last night.
A.hosts
B.hostesses
C.guests
D.celebrators

It’s important for children to get a good ___.
A.educate
B.education
C.educator
D.educational

Sometimes he does not pay ___ to his teachers so he does not get high marks.
A.love
B.attention
C.expectation
D. tim