题目
第1题
ct)
第2题
A.value
B.connection
C.agreement
D.difference
第3题
Benefits of using VPNs include the following except ().
A、cost savings
B、extending connectivity to telecommuters,mobile users and remote offices
C、low security
D、high reliability
第5题
A.can’t have been
B.shouldn’t have been
C.mustn’t have been
D.needn’t have been
第6题
This is the first time the students ______ to Hyde Park.
A、have been
B、have been gone
C、have been going
D、are being gone
第8题
We () for you everywhere. Where have you been。
A.have looked
B.looked
C.have been looking
D.are looking
第10题
A.have been
B.has
C.have
D.has been
第11题
Perhaps the experiment _____ by this time tomorrow.
A、has been done
B、will have been bone
C、will do
D、would have done
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