A、doubt whether
B、doubtful
C、doubt it
D、doubtful whether
第1题:
I’m sorry; this kind of T-shirt is not ______ in your color and size.
A、unavailable
B、available
C、avoidable
D、able
第2题:
下面的文法中属于LL(1)文法的是
A.G(S): S → ABc A → a | e B → b | e
B.G(S): S → Ab A → a | B | e B → b | e
C.G(S): S → ABBA A → a | e B → b | e
D.G(S): S → aSe | B B → bBe | C C → cCe | d
第3题:
7、下面的文法中属于LL(1)文法的是
A.G(S): S → ABc A → a | e B → b | e
B.G(S): S → Ab A → a | B | e B → b | e
C.G(S): S → ABBA A → a | e B → b | e
D.G(S): S → aSe | B B → bBe | C C → cCe | d
第4题:
He’s watching TV? He’s ________ to be cleaning his room.
A) known B) supposed C) regarded D) considered
第5题:
下面的文法中属于LL(1)文法的是()。
A.G(S): S → ABc A → a | e B → b | e
B.G(S): S → Ab A → a | B | e B → b | e
C.G(S): S → ABBA A → a | e B → b | e
D.G(S): S → aSe | B B → bBe | C C → cCe | d