Studies show that people are more _______ to suffer from back problems if they always sit before computer screens for a long time.
A.likely B.possible C.sure D.probable
______ to improve oral English, I make great efforts and spend as much time as possible practicing it.
A.Being determined B.Be determined
C.Determined D.Having determined
–Do you know where David is? He is not in the office.
–Well, he ______ have gone far—his coat is still here.
A.shouldn’t B.mustn’t C.can’t D.wouldn’t
The days are gone physical strength was all you needed to make a living．
A.that B.when
C.where D.which
Though bought several years ago, the car is still in good .
A.situation B.condition C.standard D.position
In the past few years, more than 300 marine and island tourism and recreational zones ______ in the coastal areas, with a variety of marine features.
A.was developed B.have been developed
C.had been developed D.were developed
