______ humans, dolphins use a system of sounds and body language to communicate, but understanding their conversations is not easy for humans.

Not ______ on such a hot day, the beach was crowded.

I _______ the living room by the time Dad comes home. He will be surprised.

She ______ herself on cooking Vietnamese traditional dishes.

Thieves ______ over a million dollars in cash from the Bank of East Asia in Central last month.

An international menu _____ a variety of food can attract most of the tourists.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

    The investors bought a deserted warehouse __________ convert it into a shopping mall for the townspeople.

I haven’t been up into the attic for twenty years. Anything ______ be up there!