21. our experiment had got into____ trouble , so we decided to take _____ chance and add more water, and luckily we succeeded .
a. 不填;不填 b. a;a c .the; a d. 不填;a
22 .---where does your little daughter want to go during her holidays?
---she always looks forward to _____ to the
a. take b. taking c. being taken d .be taken
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