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ng to visit me. I’m thinking about __________.A. what present should be give himB. how to give him a surpriseC. where will we have a big mealD. whether I planned a trip for him23. Try to sing more English songs, you will find it interesting ________ a foreign language.A. learning B. learns C. to learn D. learn24. They preferred _________in bed rather than _________exercise.A. to lie, to take B. to lie, take C. lying, taking25. —Why do you get up so early every day?—________. ________ is good for our health.A. Exercise。 Exercising B. To exercise。 ExercisingC. Exercising。 Exercise D. Exercise。 Exercise26. — Which dress do you like best, Madam?—Sorry, I can39。t decide _______ now.A. to buy which one B. buy which one C. which one to buy D. which I should buy it27. —This physics problem is too difficult. Can you show me ________, Wang Lin?—Sure.A. what to work it out B. what to work out itC. how to work it out D. how to work out it 28. We should do everything we can_____water.A. to avoid wasting B. avoid wastingC. to avoid to waste D. avoid to waste29. On her way home, Lucy saw a thief ______ in a shop. She stopped ______ 110 at once.A. steal。 call B. to steal。 callC. stealing。 to call D. stealing。 calling30. Our teacher often asks us____________ questions in groups.A. discuss B. to discuss C. discussing D. discussed31. I have no idea how_