Studies show that people are more_______to suffer from back problems if they always sit before computer screens for long hours.
A.likely | B.possible | C.probable | D.sure |
After completing and signing it, please return the form to us in the envelope _______.
A.provided | B.providing | C.having provided | D.provide |
The book was written in 1946, _______ the education system has witnessed great changes.
A.since then | B.when | C.since when | D.during which |
He ______ be sitting at the gate, waiting for his lost son.
A.used to | B.was used to | C.could | D.was accustomed |
It is often recommended that children _______ chances to get close to nature.
A.must be offered | B.should offer | C.be offered | D.are offered |
If you _____ the bottle and cigarettes, you we’ll be much healthier.
A.take off | B.keep off | C.get off | D.set off |