单项选择题

Einstein’s Theory of Reltivity ws so profound tht only few scientists could uEinstein’s Theory of Reltivity ws so profound tht only few scientists could understnd it.nrrow B．superior C．wide D．deep

A.narrow
B.superior
C.wide
D.deep

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单项选择题

If I _ you, I’d join thermy.mB．wsC．wereD．would beIf I _ you, I’d join thermy.m B．ws C．were D．would be

A.am
B.was
C.were
D.would be

单项选择题

It ws not until 1920 regulr rdio brodcsts begn.while B．which C．tht D．sinc80.It ws not until 1920 regulr rdio brodcsts begn.while B．which C．tht D．since

A.while
B.which
C.that
D.since