What are you______?---I‘m _______ a letter.
A. do,reading
B. doing,reading
C. do,read
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1、is(过去式)______ 2、are(过去式)______ 3、do(现在分词)______ 4、live(第三人称单数)______ 5、I’m(完整形式)______ 6、I've(完整形式)______
选择填空Are you eating an apple?----_________.
A. No,I‘m not.
B. Yes,I'm not.
C. No,I am.
选择填空______is Chinese fast food.
A. Hamburger
B. Noodles
Chips
选择填空What are you_______?---I'm eating noodles.
A. do
B. does
C. doing