12) American woman to explore the outer space
(考点:由only, last, next,序数词或形容词最高级修饰的名词常用不定式作定语)
13) only to drop it on their own feet (考点:不定式作结果状语)
14) to meet a high school classmate in the mountain village (考点:不定式作原因状语)
15) to have taken up so much of your time (考点:1. 不定式作原因状语;2. 不定式的完成时)
16) to be standing in the doorway when he rushed in (考点:不定式的进行式)
17) to be treated as a guest (考点:不定式的被动形式)
18) go to the campus bookstore to buy used books (考点:不带to的不定式)
19) but play bridge the whole day (考点:同上)
20) to wipe our feet on the mat before going into the room
(考点:当动词see, make, hear等用于被动语态时,不定式要保留to)