A.The US President Barrack Obama hasn't been visited Viet Nam since 2016.
B.The US President Barrack Obama visited Viet Nam since 2016.
C.I have visited The US President Barrack Obama for the last five years.
D.The US President Barrack Obama hasn't visited Viet Nam since 2016.

A.The US President Barrack Obama hasn't been visited Viet Nam since 2016.
B.The US President Barrack Obama visited Viet Nam since 2016.
C.I have visited The US President Barrack Obama for the last five years.
D.The US President Barrack Obama hasn't visited Viet Nam since 2016.

A.their excursion
B.cancelled
C.was
D.disappointing

A.am watched
B.was being watched
C.have been watched
D.be watched

A.on
B.in
C.about
D.out

A.The more/ the faster
B.The most/ the faster
C.The most/ the fastest
D.The more/ the fastest

A.side
B.suburbs
C.outskirts
D.outside

A.respected
B.viewed
C.inspected
D.showed

A.keep
B.make
C.have
D.do

A.follow-up
B.turn-up
C.start-up
D.break-up