【推荐1】She ________ stepped on his foot on a crowded commuter train. (accident)

【推荐2】X-rays were a__________ discovered by Dr. Roentgen in a random experiment in 1895. Because he didn't know what the rays were so he named them 'X'，meaning ‘unknown’.

【推荐3】Drive carefully, Mike. There may be someone lying a_______________ on the road.

【推荐1】The X-ray, chips and the popular drink, cola, were all were invented by ________ (偶然).

【推荐2】People can’t get success ________ quickly. They need to work hard and stick to their goals. (偶然地)

【推荐3】Some inventions were invented by a_________, like tea.

【推荐1】Success doesn’t come ________, and it depends on days’, even years’ hard work. (偶然)

【推荐2】As we all know, success is not made ________. Instead, it needs a lot of talent and hard work. （偶然）

【推荐1】My dad knows Chengdu a little. He has been to Chengdu on ________ (busy) twice.

【推荐2】Mike is ____________ and wears glasses. He loves painting in his spare time. (中等身高)

【推荐3】用适当的介词填空
1. I'd like to put a teaspoon _______honey in my water.
2. Do you know that Thanksgiving is _______ the fourth Thursday in November?
3. The baby is too young, so you need to cut the food _______ pieces and give it to him.
4. Here is one way of making turkey_______a Thanksgiving dinner.
5. Please put the bread on the table and cover it _______ a piece of cloth.