I wrote down the name and address of the hotel ________ later reference, because it might be useful in the future[ ]

But for the sudden rainstorm, our trip to Hong Kong _____ a very pleasant one. [ ]

I had been working on math for the whole afternoon and the numbers________ before my eyes.[ ]

Will students have lots of homework to do this weekend— ________. Teachers won’t give them homework any more.

With the help of high technology, more and more new substances ___in the past few years