When his mother came home, he pretended sound.
.It is uncertain whether the medicine will work on the this cold, _________?A. is it B. isn't it C, will it D. won't it
.It is definite that new digital mobile phones have less radiation, but that does not________mean that they should be used without caution.
.____________the advantages against the disadvantages, I decided to take up the job as a clerk in the bank.
The previous lecture focused on the reading problems in new words, while this lecture will turn to___________in complex sentence structures.
.Being exposed for a long time_____strong sunlight might seriously damage your skin.