A.Being able to easily blend with people
B.The ability to travel a long distance
C.Being able to regulate his or her emotions
D.The competence to act in different situations

A.delivered
B.dissolved
C.separated
D.removed

A.The first man on Mars
B.Human adaptation to space
C.What makes a good astronaut?
D.Difficulties encountered by Yuri Gagarin

A.The first man on Mars
B.Human adaptation to space
C.What makes a good astronaut?
D.Difficulties encountered by Yuri Gagarin

A.higher
B.bigger
C.greater
D.larger

A.who
B.when
C.that
D.whose

A.make
B.have
C.give
D.bring

A.therefore
B.thus
C.however
D.instead

A.number
B.each
C.amount
D.few

A.number
B.each
C.amount
D.few