29 They expected (not meet) ________not meeting__________ him at the airport

giải thích : expect+Ving = expect+O+toV

30. Before she went to the cinema she (buy) _______had bought____________ the ticket.

Form  : QKHT+ before+QKĐ

cấu trúc thì QKHT

S+had+V3/ed.......

31. They are whispering to avoid (hear)_____hearing__________by their parents.

avoid+ving : tránh làm j

James (not attend) ________didn't attend________ our wedding party last year.

có last year nên dùng QKĐ.

cấu trúc thì QKĐ : S+(didn't+V0)/V2/ed+..........

`29.` not to meet

`-` expected to V : mong chờ, mong muốn điều gì sẽ xảy ra.

`30.` had bought

`-` Before + S + V (qkđ), S + V (qkht) : Trước khi làm việc gì đã làm việc gì.

`31.` didn’t attend

`-` Thì QKĐ dấu hiệu  last year.

`-` Có not `->` câu phủ định ( S + didn't + Vinf )