23��-Are you engaged in writing your essay?
-Yes, I it this afternoon, the latest.
A��just finish B��have just finished
22��They were happy with their marks after the test, they expected them to be a bit higher.
A��though B��if C��since D��unless
及匯准 汽�醋鄂�(慌15弌籾��耽弌籾1蛍��諾蛍15蛍)
貫A、B、C、D膨倖僉�釀丕�僉竃辛參野秘腎易侃議恷煮僉�遑�旺壓基籾触貧繍乎�醉榛據�
21��These two chemicals interact with each other at certain temperature to produce
substance which could cause an explosion.
A��a ; a B��/ ; a C��the; the D��the ; a
及屈准 亟恬(諾蛍30蛍)
功象和中議夕頭坪否��葎蝶哂囂烏芙亟匯鐙購噐厘忽住宥並絞議烏御。酒峰概事議裡墾��蛍裂並絞議圻咀旺戻竃秀咏。
忖方勣箔��120-150。