题目内容

We put down a ______ on a house yesterday

A. certificate
B.receipt
C. recommendation
D. deposit

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X-rays were discovered by a German scientist_________name was WilhemKonradRoentgen.

A. his
B.the
C. whose
D.her

The patient had appendectomy(阑尾切除术),_______means surgical removal of theappendix.

A.it
B.that
C. when
D.which

Having fully recovered after three months' stay in the ENT ward, he was______ the hospital.

A.sent into
B.charge
C.freed from
D.discharged from

Anything________is invisible to the naked eye is said to be microscopic(微小的).

A. which
B. that
C. who
D. It

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