The river have ________, so they will have to spend much money irrigating(灌溉) the crops.
Wheneverabigcompany_______asmallone,theproductalmostalwaysgetsworse.
Astheapplause_____,thecurtainonthestagedroppedslowly.
Afteryouhavelearnedsomethingnew,itisimportantthatyoutryto_________.
Do you know the boy _______ under the big tree?
-What do you think of the book? -Oh, excellent. It’s worth ______ a second time.