单项选择题

______ enough time and money, the researchers would have been able to discover more in this field.

A．Giving
B．To give
C．Given
D．Being given
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单项选择题
What is the purpose of a canal lock
A．To keep out boats that are too large for the canal.
B．To measure the tonnage of canal boats.
C．To load and unload the cargo.
D．To change the depth of the water.
单项选择题
What is NOT mentioned when Maggie is talking about her experience in Ocean Park
A．Sharks.
B．Dolphins.
C．Tropical fishes.
D．Crocodiles.
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