(B)1.Eat less food __unless____ you want to put on weight.
A.if (如果) B.unless(除非) C.until(直到,直至) D.as soon as(一...就)
根据句意,前后意思相反,所以选unless.
翻译:除非你想增肥,否则少吃点东西.
(D)2.Guilin is the most beautiful place __that____ people all over the world want to visit.
A.where(用于地点状语从句) B.which(用于定语从句) C.what(用于宾语从句) D.that(用于定语从句,与最高级为固定搭配)
翻译:桂林是全世界人们都想游览的美丽之地.