It is uncertain ___ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it.
| A．that | B．whether | C．how | D．what |
This dictionary,the few pages _________are missing,is of no use.
| A．among which | B．of which | C．in which | D．to which |
I slept on the bed _________ I put my shoes.
| A．where | B．on which | C．under which | D．in which |
I don’t know the reason _________ he’s come so late.
| A．/ | B．for which | C．why | D．all the above |
There is no such place_________you dream of in all this world.
| A．that | B．what | C．which | D．as |
Government reports,legal papers and most business letters are the main situations________English is used.
| A．when | B．that | C．how | D．where |