【主題句型】at best + N 

說明︰此句型意為「最好也不過；最多也不過；充其量」。等於“nothing but ...”。

例句4：At best our store can offer you an exchange for your purchase. 我們店裡最多只能提供您更換您購買的商品而已。

*請用nothing but改寫本句：Don’t expect much of him; he is at best a student.

i助教建議解答：Don't expect much of hime; he is nothing but a student.