A、doubt whether
B、doubtful
C、doubt it
D、doubtful whether
Our work is not so good as ( ).A、hisB、himC、heD、he's
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Computers are()of doing billions of calculations in a fraction of a second now.A.able;B.capable
Mary is a very()woman. She is successful in her career and she is a good mother and wife, too.A.able;B.capable
Such suffixes as " － able" and " － ment" in Modern English originally came from_______A FrenchB Old EnglishC LatinD Greek
I’m sorry; this kind of T-shirt is not ______ in your color and size.A、unavailableB、availableC、avoidableD、able
选哪一个He’s watching TV? He’s _______ He’s watching TV? He’s ________ to be cleaning his room.A) known B) supposed C) regarded D) considered
下面的文法中属于LL（1)文法的是A．G(S): S → ABc A → a | e B → b | eB．G(S): S → Ab A → a | B | e B → b | eC．G(S): S → ABBA A → a | e B → b | eD．G(S): S → aSe | B B → bBe | C C → cCe | d
