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Front

I haven’t seen Tom …………… he gave me this book.

Back

since

Front

2. ….. it is getting dark, she still waits for him.

Back

although

Front

3. …….. he has a headache, he has to take an aspirin.

Back

Because

Front

He had left …….. I came.

Back

By the time

Front

5. ……. it rained heavily, they went to school on time.

Back

A and C are correct.

Front

Our visit to Japan was delayed …….. my wife’s illness.

Back

because of

Front

7. ……… he comes to theater with me, I shall go alone.

Back

Unless

Front

Trees won’t grow ……. there is enough water.

Back

Unless

Front

The flight was delayed due to bad weather.

Back

B and C are correct.

Front

10. ………. she’s busy, she still helps you.

Back

Although