The field research will take Joan and Paul about five months; it will be a long time __________ we meet them again.
A.a(chǎn)fterB.beforeC.sinceD.when
B。
before引導(dǎo)時(shí)間狀語(yǔ)從句。It will be a long time before…的意思是“要過(guò)很久才會(huì)……”,如:It will be a long time before we finish this dictionary. 我們需要很長(zhǎng)的時(shí)間才能把這部詞典編完。It was a long time before I got to sleep again. 過(guò)了好久我才又睡著。
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