According to the article, ________
A.jet lag can affect different abilities differently
B.flying seriously affects your judgment and decision-making
C.travelers complain about the negative effects of flying
D.various factors stop us sleeping when we fly

The direction you fly in_______
A.extends or shrinks your body clock
B.alters your body’s natural rhythms
C.helps the degree of jet lag
D.affects the degree of jet lag

Jet lag______
A.makes our body clock operate badly
B.causes our body clock to change
C.extends the hours of our body clock
D.upsets our body’s rhythms

The main function of the body clock is to_____
A.help us sleep
B.help us adapt to a 24-hour cycle
C.regulate the body’s functions
D.govern all the body’s responses

Jack made me ................ him next week.
A.to promise to call
B.promise to call
C.to promise calling
D.promise calling

Do you enjoy ................ other countries?
A.visit
B.to visit
C.visiting
D.visited

You................ to school if you want your health to be better tomorrow.
A.don't go
B.shouldn't go
C.wouldn't go
D.are going

Choose the correct answer:
You don’t actually get a lot of.................. from news report on radio or TV.
A.inform
B.information
C.informative
D.informed

Choose the correct answer:
It’s as if they don’t care whether their reply is.......... or not.
A.believe
B.believed
C.believable
D.unbelievable

Choose the correct answer:
When Jill was at.............. school she used to dream of being a DJ on local radio.
A.second
B.secondary
C.secondly
D.secondment