A：He is in the library.
B：She is in the shop.
某果园的苹果树大都产量较低、果实品质欠佳，若要尽快更新为优质苹果树，提高果实的品质和产量，你认为最好应采取下列哪一措施？（ ）
He puts five ____ (pound) into the bottle every day.
下列哪条食物链是正确的（ ）
