Question

Each mobile ________ quite good, but they each ________ dear．

1. A.
   seem, are
2. B.
   seem, is
3. C.
   seems, are
4. D.
   seems, is

Answer 1

C
each作定语时，谓语动词用第三人称单数，因此排除选项A和B，第二句子中的each作同位语，其谓语取决于they。