＿＿＿＿four years since I joined the army.
| A．There was | B．There is | C．It was | D．It is |
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 |
---It was really very kind of you to give me a lift home.
---Oh, don’t mention it. I _____ past your house anyway.
| A．was coming | B．will come | C．had come | D．have come |
The politician has been warned that he would be getting into great trouble ____ stick to his standpoint.
| A．were he to | B．he will | C．he was to | D．would he |
The boy spent as much time playing video games as he ____ studying.
| A．does | B．had been | C．was | D．did |
Have you got any explanation to the question ___ he came here for last weekend?
| A．why | B．what | C．how | D．which |