请比较下列每组单词并选择正确的一个填入空格中。 1. mother motherly a. She took her _____________ duties very seriously. b. She’s an English teacher and a _________ of two children. 2. survive survival a. Camels can _________ for many days with no water. b. The man was caught up every day in the struggle for __. 3. interference interfere a. We oppose _____________ by any outside force. b. Anxiety can ________ with one’s performance in exams. 4. please ( v. ) please ( ad. ) a. Can you help us _____________ ? b. She did everything she could to _____________ him. 5. spot spotless a. This shirt has a _____________ on the cuff. b. It’s difficult for the mom to keep this house _____________.