Where are you going, Sam —There isn’t any ______ in the fridge. I’ll go and buy some.

With the help of high technology, more and more substances _________ in the past years

How was your report, Sam — Not bad, but I need to do better in ______.

What surprised me most was to see some of thevillage people ______ on the benches at the end of the classroom .

Jack took the 8:30 bus to Guangzhou this morning.—Really? He ______ 8:20 Express. It is much more comfortable and faster to travel by train.