The customer left the waiter a ________ tip because he had been especially friendly and helpful.

(2013·湖北卷)While intelligent people can often________the complex，a fool is more likely to complicate the simple

It was ________ your timely help that we accomplished the task on time.[ ]

The number of the students in our class________ 70.

I would rather ________ to work after my graduation, but my fathe would rather I ________ abroad for further education.