A（n)______shape has four straight sides at 90°to each other, two of which are much longer

U.S. presidents normally serve a（n) ______ term.A．two－yearB．four－yearC．six－yearD．eight－yea

She has a（n)_____knowledge of New York, where she has lived for twenty years.A．perfectB．or

The word "unhappiness" has______morphemes.A．oneB．twoC．threeD．four

The numbers in Paragraph Four are used to support the opinion that______.A．Hispanics are n

In no country other than England, it has been said, ______one experience four seasons in t

The new product has the same design, but it is______shaped from the old one.A．differentB．m