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【題目】Last week, there were three _________ and two _________ coming to visit our school.

【題目】—Do you know ________ now?

【題目】—Cindy, is this your model plane?

【題目】I was about to leave _________ I heard someone knocking at the door.

【題目】It's my pleasure to make the ________ /ntr'dkn/ of my new product.

【題目】Leo fell asleep when he ________ in bed last night.

【題目】If I had a million dollars, I'd give it to medical ________ /rst/ .

【題目】—It ________ a long time since we ________ last time.

【題目】I’ll let you know if there ________ any mistake in your report.

【題目】Be quiet! Grandpa ________ an interesting story to those children now.