May I trouble you with the question -Sorry, but it is______ my knowledge.

________ food and equipment was kept inthat cave during the war time

According to the rules, students ______ get grades not lower than 85% in any subject in order to get the scholarship.

There is still much to discussWe shall，______，return to this item at our next meeting

______ pressure the US government put on the Chinese government, China would stick to its own policy of exchange rate