1.( )A long strong stick _________ the earth just now.A.was knocked in B.was knocked into C.knocked in D.knocked into2.( )Mary ________ some songs in her room in the morning.A.heard sing B.heard to sing C.was heard sing D.is heard to sing

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1.( )A long strong stick _________ the earth just now.A.was knocked in B.was knocked into C.knocked in D.knocked into2.( )Mary ________ some songs in her room in the morning.A.heard sing B.heard to sing C.was heard sing D.is heard to sing

1.( )A long strong stick _________ the earth just now.A.was knocked in B.was knocked into C.knocked in D.knocked into2.( )Mary ________ some songs in her room in the morning.A.heard sing B.heard to sing C.was heard sing D.is heard to sing
1.( )A long strong stick _________ the earth just now.
A.was knocked in B.was knocked into C.knocked in D.knocked into
2.( )Mary ________ some songs in her room in the morning.
A.heard sing B.heard to sing C.was heard sing D.is heard to sing

1.( )A long strong stick _________ the earth just now.A.was knocked in B.was knocked into C.knocked in D.knocked into2.( )Mary ________ some songs in her room in the morning.A.heard sing B.heard to sing C.was heard sing D.is heard to sing
1/ b
2 我觉得应该是 was heard singing 可是一个都没有

B
C

B.was knocked into
D.is heard to sing

1. B
2. D

1 b 棍子被敲进去, 被动, 表过程 用into
2 d 同样被动,被听到 答案最好还是 was heard singsing