Sealing food in an ______ jar starves the bacteria of oxygen and they are unable to reproduce.
A.airborne
B.airtight
C.air-dash
D.air-drop

She ______ herself on cooking Vietnamese traditional dishes.
A.focuses
B.motivates
C.congratulates
D.prides

In the hands of a careless female driver, a LEAD motorbike may become a _____ weapon.
A.fatal
B.mortal
C.lethal
D.deathly

Not ______ on such a hot day, the beach was crowded.
Giải thích:
Ta dùng hiện tại phân từ tạo mệnh đề quan hệ rút gọn đối với dạng chủ động (dạng bị động ta dùng quá khứ phân từ)
Ở đây “offering” được hiểu là “which offers”
Tạm dịch: Một thực đơn quốc tế cung cấp nhiều món ăn đa dạng có thể thu hút hầu hết khách du lịch.
Đáp án:B
A.surprise
B.surprised
C.surprising
D.surprisingly

Tim's parents ______ happy when knowing his poor academic results at school.
A.mustn't have been
B.needn't have been
C.shouldn't have been
D.can't have been

Margaret would prefer ______ books rather than see their screen adaptations.
A.to read
B.reading
C.read
D.having read

I _______ the living room by the time Dad comes home. He will be surprised.
A.will paint
B.am painting
C.have painted
D.will have painted

When______ is not known.
A.it was invented the wheel
B.the wheel was invented
C.the invention of the wheel
D.was the wheel invented

They asked me a lot of questions, ______I couldn’t answer.
A.all of which
B.that
C.all of whom
D.who

This one is prettier, but it costs ______as the other one.
A.twice as many
B.as many
C.twice as much
D.so much