A had the plane landed  B did the plane land C the plane had landed  D the plane landed

A The;the   B /;/  C A;the D /;the

A he worries about             B he worried about C did he worry about            D does he worry about

A when        B what        C whether       D how

A needn't B can't  C may not D mustn't

A don't hope B hope not so C do not hope  D hope not

A not watch B must not to stay  C not be watching D staying not

A invent B do C produce D create

A in fact B eventually  C practically   D as a matter

A country B state  C city   D county