Toobtainasatisfactoryresult，onemustapplytwo____ofpaintonacleansurface.
A
「句意」 为获得一个满意的结果，你必须在一个干净的表面上涂两层油漆。
「难点」 coat 意为“覆盖物， 层”;level 意为“(建筑物) 楼层”;times 意为“次， 回”;courses 意为“(一层)砖面;一排” 。
_____ifIhadarrivedyesterdaywithoutlettingyouknowbeforehand.
Shehiredalawyertoinvestigate,onlytolearnthatGabrielhadremovedhernamefromthedeed.Theinfinitiveverbphrase“onlytolearn”isused____.
Henoticedthehelicopterhoveringoverthefield.Thentohisastonishment,hesawaropeladder_____outandthreemenclimbingdownit.
Whataniceday!Howaboutthethreeofus_____awalkintheparknearby.
Itisnotuncommonforthere_____problemsofcommunicationbetweentheoldandtheyoung.