Living in the central Australian desert has its problems, _____ obtaining water is not the least.
| A．of which | B．for what | C．as | D．whose |
Computers ____ in offices and homes since 1970s.
| A．have been used | B．had been used | C．was used | D．has been used |
More attention must be paid____ the endangered animals.
| A．protect | B．to protect | C．to protecting | D．protecting |
She doesn’t like the way ___ you speak to her.
| A．to | B．in that | C．how | D．in which |
The young man helped the company recover , so his boss gave him an apartment ____.
| A．in return | B．in turn | C．in charge | D．in fact |
This book ____ 12 units, _____ the unit of Music.
| A．contains. Including | B．includes; containing |
| C．contains, includes | D．including; contains |