几道CET4的题目Itwasessentialthattheapplicationforms____backbeforethedeadline.A)mustbesentB)wouldbesentC)besentD)weresent选CWe____ourbreakfastwhenanoldmancametothedoor.A)justhavehadB)havejusthadC)justhadD)hadjustha
几道CET4的题目
Itwasessentialthattheapplicationforms____backbeforethedeadline.
A)mustbesent
B)wouldbesent
C)besent
D)weresent
选C
We____ourbreakfastwhenanoldmancametothedoor.
A)justhavehad
B)havejusthad
C)justhad
D)hadjusthad
选D
Themanagerpromisedtokeepme___ofhowourbusinesswasgoingon.
A)tobeinformed
B)oninforming
C)informed
D)informing
选C
Anewtechnique___,theyieldsasawholeincreasedby20percent.
A)workingout
B)havingworkedout
C)havingbeenworkedout
D)tohavebeenworkedout
选C
请将每道题具体说明理由,谢谢