I'm most grateful to you for taking so much trouble to explain the best way of getting there.
你不厌其烦地给我解释去那里的最佳途径,我对些深表感激。
when she remembered that she had gone shopping after the home help had left and she knew that she had turned both keys in their locks,
但突然记起来了,帮手是在她出去买东西之前走的,她还记得曾用了两把钥匙把大门锁上了。