- The professor asked a question, and David ________ a good answer.
- He would have given you more help, if he ________ so busy.
- After months of voyage, Columbus arrived in ______ later proved to be a new continent.
- It rained hard yesterday, ______ prevented me from going to the park.
- It is important to ________ your skin from the harmful strong sunlight.
- He was ______ to withdraw from running for the presidency.
- The two girls competed with each other ______ the highest mark.
- If the operation ________ carefully prepared, it would not have been successful.
- It took me a month to get rid _______ the cough.
- The furniture in her bedroom is quite different from ________ in the living room.
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