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【題目】The rain stopped and the sun ______.

【題目】She looks beautiful ______ she is not young.

【題目】I'm waiting for my friend.______，I'll go shopping alone.

【題目】Don't cut down the trees ______ the butterflies need to rest on.

【題目】There are many mysteries to ______ by scientists.

【題目】All the butterflies have left ______ the north in spring.

【題目】The exciting thing has ______ these boys' attention.

【題目】Our teacher often encourages us ______ hard.

【題目】It's interesting ____ experiments in class.

【題目】—Shall we go for a walk?