In manufacturing, cheaper materials are constantly being for the better, more expensive kind.
| A．maintained | B．cancelled |
| C．substituted | D．deposited |
You have not yet answered my question _______ I can join in the party tonight．
| A．whether | B．if | C．which | D．that |
Regulations require__________needs special diets the cooking manager in advance.
| A．who; informs | B．whom; informed | C．whomever; inform | D．whoever; inform |
I'd like to work with ______ is honest and easy to get on with．
| A．who | B．whoever | C．whomever | D．no matter who |
The way people act in private is often different from ______ they act in public.
| A．how | B．when | C．which | D．That |
__________has finished the work ahead of time will be rewarded．
| A．Those who | B．Anyone | C．No matter who | D．Whoever |