I don't ______ when I heard from him.
A. [A] remember
B. [B] learn by heart
C. [C] keep in mind
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Sam was very ill, so his mother sent ______ the doctor.
A. [A] for
B. [B] away
C. [C] out
Do you remember how many brothers ______
A. [A] does he have
B. [B] he has
C. [C] has he
______ some of this juice perhaps you'll like it.
A. [A] Try
B. [B] Trying
C. [C] To try
Since I began to work here three years ago, this factory ______ in size.
A. [A] had doubled
B. [B] has doubled
C. [C] doubled