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[sasso man]

Choose:
1.Did they ever discover the .... of the fire ?
reason-purpose-explanation-cause

2. We arrived an hour late. The film .... half an hour earlier.
began - was beginning - had begun - has begun

3. they .... be at school by 8 o'clock everyday. school starts at eight.
have to - should - might - can

4. you'll have to hurry. your lesson .... in half an hour
is going to start - starts - will start - start