单项选择题

A student is (allowed) to (enter into) this room (only if) a teacher (has) given permission.

A．allowed
B．enter into
C．only if
D．has
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单项选择题
(Despite) they are (small), the horses are (strong) and (have) great energy.
A．Despite
B．small
C．strong
D．have
单项选择题
(The simplest) kind of plant, (alike) the simplest kind of animal, (consists of) (only one) cell.
A．The simplest
B．alike
C．consists of
D．only one
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