问题

The light bulb ______ by Edison in the middle of the1780s.

A:is invented
B:was invented
C:invented
D:invent

正确答案是：

同类题型

The boy insistedthis;given

Can you believe I had to pay 20 dollarsfor a haircut—You should try the barber’s ______ I go.It’s only 10 dollars.

rains leave every 15 minutes; if you miss ____ , you don’t have to wait long for another.

I’m sorry I’m late but I had a ____ tyre. — Never mind. Just go to your seat. [ ]

Why not ________ an English Club to practice ________