泡腾片指含有碳酸氢钠和有机酸,遇水可产生气体而呈泡腾状的片剂。
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Short conversationsIn this section, you'll hear some short conversations. At the end of each conversation, one question will be asked. Both the conversation and the question will be spoken only once. After each question, choose the best answer from the four choices marked A, B, C, and D.
A. . It is chaotic.
B. . It is relaxing.
C. . It is friendly.
D. . It is noisy.
listen to the recording
A. . Ask relatives to check for double coins.
B. . Buy unusual coins from other people.
C. . Change coins with other collectors.
D. . Get help from parents and friends.
listen to the recording
A. . Keep them away from hot locations.
B. . Keep the water in the vase fresh.
C. . Make sure the stems are short.
D. . Put enough water in the vase.
listen to the recording
A. . Where to hang out with her friends.
B. . How to kill time while she is alone.
C. . How to make friends in a new place.
D. . Which club she might have an interest in.
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