1.I'll spend as much time as I can _____ after the flowers in the garden.
A.look B.to look C.to be looked D.looked
2.We will have the sports meeting on time ______ it doesn't rain.
A.if B.unless C.while D.though
（着重分析A和B两个选项）
3.This week,the weather ______ to change everyday:One day is hot,the next is cold.
A.looks B.seems C.sounds D.feels
(着重分析A.B和C三项)
4.The Olympic five rings represents for the five parts of the world.
(这里的represent要不要加S)