$\text{1. Hoa is the most intelligent in my class}$
$\text{2. Hoa is the same age as Lan}$
$\text{3. The read car is more expensive than the black car}$
$\text{4. How much does your bike cost ?}$
$\text{5. What is your day of birth ?}$
$\text{6. How much does Mai weigh ?}$
$\text{7. Trung was absent from school last Saturday}$