I had a really hard time _____studying science this term.A．toB．withC．inD．on
题型：不详难度：来源：
| I had a really hard time _____studying science this term. |
答案
| C |
解析
| 表示在什么上很辛苦可用have a hard time（in）doing sth，故本题选C。 |
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