Generally speaking， ______ according to the directions，the drug has no side effect．
| A．when taking | B．when taken | C．when to take | D．when to be taker |
The parrot, the bird which can be taught to talk, can create a (n) _____ atmosphere anywhere.
a. living b. natural c. artificial d. lively
At the meeting they discussed three different _____ to the study of maths.
a. approaches b. means c. methods d. ways
The policeman told the injured bicycle rider that he would have to lie _____ he had fallen until the arrival of an ambulance.
a. because b. where c. after d. when
Atomic energy has _____ many uses, either as fuel or as radiation, _____ it is almost impossible to imagine all the great changes it will bring into our lives.
a. such…as b. such…that c. too…then d. so…that
In a public library one has access to whatever book _________ in Britain.
a. appearing b. having appeared c. appears d. that appears