【C16】A．toB．asC．forD．by

【C9】A．toB．ofC．forD．in

【B2】A．toB．byC．forD．after

【C16】A．exposed toB．discovered byC．experimented byD．absorbed by

【C16】A．consideringB．asC．givenD．by

【C16】A．soB．asC．muchD．not

【C3】A．toB．aboutC．forD．with