______ of years later, the first extremely small plants began to appear on the surface of the water.

I don’t like learning math. Because it’s not so_______ as English.

The old couple ______ for 50 years and never once have they quarreled with each other.[ ]

There is no possibility________ he will keep his word. He is always telling lies.

1 Suddenly he caught ________sight of aman who went into the telephone booth to make ________ call