Great changes ___________in my hometown in the past 30 years.
| A．took place | B．have taken place |
| C．would take place | D．take place |
____ matters most in learning English is enough practice.
| A．What | B．Why | C．Where | D．Which |
Engines are to machines _________ hearts are to animals.
| A．as | B．that | C．what | D．which |
____ team wins on Saturday will go through to the national championships.
A. No matter what B. No matter whichC Whatever D. whichever
Nobody believed his reason for being absent form the class _____he had to meet his uncle at the airport.
| A．why | B．that | C．where | D．Because |
There is much chance Bill will recover from his injury in time for the race.
| A．that | B．which | C．until | D．If |