单项选择题
Samuel has curly hair but his twin sister's is quite __...
单项选择题Samuel has curly hair but his twin sister's is quite ______.
Tim, the footballer, always scores _______ at football ...
单项选择题Tim, the footballer, always scores _______ at football matches, but he feels frustrated at each examination.
The production of tin ore in the United States is relat...
单项选择题The production of tin ore in the United States is relatively insignificant, _______ less than one hundred tons annually.