Next door to ours ______, who has achieved much in physics.
| A．where lives an old scientist | B．where does an old scientist live |
| C．lives an old scientist | D．does an old scientist live |
______ he referred to in his article was unknown to the general reader.
| A．That | B．What | C．Whether | D．Where |
____ matters most in learning English is enough practice.
| A．What | B．Why | C．Where | D．Which |
I just wonder __________ that makes him so excited.
| A．why it does | B．what he does | C．how it is | D．what it is |
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 which C Whatever D. whichever