However, the eruption itself is really exciting and I shall never forget my first sight of one.

However, the eruption itself is really exciting      and I shall never forget my first sight of one.

#95013

to watch

to be watched

watched

watching

推荐题目

－Look! Everything here is under construction.－Oh, has the building once _________ for exhibition been pulled down, too?

#95299

being built

been built

to be built

built

I need some paper _____.

#98659

to write

to write on

to write with

writing in

______the workshops, the executives had a talk with the workers.

#96795

Inspected

Inspecting

Having inspected

Having been inspected

The first textbooks _____for teaching English as a foreign language came out in the 16th century.

#98376

having written

to be written

being written

written

The money collected should be made good use        the people in need.

#92410

of helping

to help

of to help

to helping

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