Let me congratulate ________ you ________ the birth of your daughter[ ]

What ______ at seven yesterday morning

The River Nile is said to be ____ longer than this one Which is wrong? [ ]

Students are not required to take the TOEEL or the IELTS test but we welcome the submission of your score if you have taken _____.

udy in Peking University lasted four years, ______ he founded his own company in Hong Kong.