【单选题】The sentence 'Hundreds of the vast blocks had been built before anyone began to doubt about whether they were good solutions or not' means that ______.
A.
it was not until hundreds of the vast blocks had been built that people began to doubt whether they were good solutions or not
B.
hundreds of the vast blocks had not been built until anyone began to doubt whether they were good solutions or not
C.
people began to doubt whether they were good solutions or not before hundreds of the vast blocks had been built
D.
since hundreds of the vast blocks had been built, some people began to doubt whether they were good solutions or not
【简答题】Senor Viladomat, an important Spanish , is coming to your company for a meeting about a new product. You are responsible for arrangements for his trip. Write a e-mail to Senor Viladomat's...