Over the past 30 years, the average robot price________by half in real terms, and even further relative to labor costs.

• A. is fallen
• B. has fallen
• C. were fallen
• D. have fallen

When I came to visit her last night, she________a bath.

• A. is having
• B. was having
• C. has had
• D. had had

John________in the same house since he left school.

• A. lived
• B. had lived
• C. was living
• D. has lived

Since Tom________, I have heard nothing from him.

• A. had left
• B. left
• C. has left
• D. was left

He will take the dog out for a walk as soon as he _______ dinner.

• A. finish
• B. has finished
• C. will finish
• D. finished

John ___________ tennis once or twice a week.

• A. is playing usually
• B. is usually playing
• C. usually plays
• D. plays usually

Tom _________________ his hand when he was cooking dinner.

• A. burnt
• B. was burning
• C. has burnt
• D. had burnt

Everything is going well. We ____________ any problems so far.

• A. didn't have
• B. don't have
• C. haven't had
• D. hadn't had

Jane _______________ just a few minutes ago.

• A. left
• B. has left
• C. leaves
• D. had left

When I was a child, I used to _____________ the violin.

• A. was playing
• B. am playing
• C. played
• D. play